Pipe-joint.



G. W. SANDIFORD.

PIPE JOINT.

APPLICATION FILED JULY 25, 1913.

1,091,462. Patented M3124, 191L GREEN W. SANDIFORD, OF MOBILE, ALABAMA, ASSIGNOR OF TWO HUNDRED AND EIFTY ONE-THOUSANDTHS TO HIMSELF, ONE HUNDRED AND EIGHTY-FIVE ONE- THOUSANDTHS TO W. C. BAUMHAUER, ONE HUNDRED AND EIGHTY-FIVE ONE- THOUSANDTHS TO JACOB RUBEL, ONE HUNDRED AND EIGHTY-EIVE ONE-THOU SANDTHS TO JACOB MARKSTEIN, AND TEN ONE-THOUSANDTHS TO ROBERT E. BLOW, ALL OF .l\v'.OE]'.LE1, ALABAMA, AND ONE HUNDRED AND EIGHTY-EIVE ONE- THOUSANDTHS TO PAUL P. LOCKLING, OF ERUITDALE, ALABAMA.

PIPE-JOINT. l

Lcai ,eea

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed .Tuly 25, 1913. Seal No. 781,224.

T0 all vcho/'a it may concern Be it known that I, GREEN iV. SANDirono, a citizen of the United States` residing at Mobile. in the county of Mobile and State of Alabama, have invented certain new and useful improvements in Pipe-Joints; and l do hereby declare the following to be a full, clear. and exact description of the inrention` such as will enable others skilled in the art to which it appertains to make and use the same.

rihis invention relates to lock joints for stove and other pipe and has for its object to produce an inexpensive joint which will be more certain and efficient in action than those heretofore proposed.

To these ends the invention consists in the novel details of construction more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views :,-Figure l is an elevational View of a pair of pipe sections provided with my invention; Fig. 9., is a sectional View taken on the line 2-2 of Fig. l; Fig. 3 is a plan view of a pipe section laid out flat to illustrate the graduated lengths of the locking tongues; and Fig. at is a view similar to Fig. 3, showing the slots with which said graduated tongues engage.

l, indicates a pipe section provided with the tapered locking tongues 2, 3 and 4, pref` erably formed by slitting the metal along the diverging lines 5 and 6, leaving the integral or hinge portion 7 intact. The tongue 2 is made longer than the tongue 3, and the latter is likewise made longer than the tongue fi, as illustrated. These graduated lengths of the tongues are convenient-ly had by varying the inclinations of the slits 5 and 6 to each other. That is to say, the greater this inclination, the shorter will be the tongue for the same length of hinge portion 7. It is preferred to provide three tongues 2, 3 and 4 at 1200 apart around the section l, but, of course, this number may be increased or decreased, if desired. Associated with these locking tongues are the slots S, 9 and l0 in the companion pipe section 11, also located 120O apart around the said section 11, and adapted in their locked position to fit up against the integral hinge portions 7 of the tongues.

It is well known that heretofore in the act of assembling and disassembling locking pipe joints somewhat similar to mine, great ditliculty has been experienced in getting the tongues and slots to interlock, and with inexperienced labor this difliculty has often resulted in either marring the pipe or interlocking parts, or else in leaving the pipe sections merely telescoped, the one within the other', and in their unlocked condition. The result of this first condition is to soon destroy the joint and render it impossible to interlock the sections, while the result of the second condition is often a separation of the joints and a disastrous fire. The reason for this difficulty in interlocking the sections resides in the fact that prior to my invention, the tongues Vhave been made of the same length, so that no guides being provided, it was necessary to have them all exactly opposite their slots and to engage all of them with their slots simultaneously, which is a most difficult operation for unskilled labor, owing to the friction and great difficulty of rotating one pipe section inside the other.

lVith my invention on the other hand, it is only necessary for the unskilled labor to bring the point of the longest tongue 2 into its slot 8, as indicated in dotted lines in Fig. 3, whereupon the pipe sections l and 11 are more or less secured together, and then to continue the rotation of said sections in opposite directions when the engaged tongue 2 and slot 8 will serve as guides to cause the tongue 3 and slot 9 to engage, and these latter will in turn compel the tongue 4 and slot l0 to engage.

It thus results from the simple expedient of making the tongues progressively shorter, that the troubles heretofore eX- perienced in locking together pipe sections are avoided. A further advantage results also in the unlocking operation in that all the tongues may be disengaged but one, all

preparations then made for the final disengagement of a dirty, sooty, pipe, whereupon a very slight movement accomplishes the final separation, without the hitches and failures usually experienced at the critical moment.

Vhat I claim is l. The combination of a pipe section provided with a plurality of locking tongues located around the pipe at predetermined positions, said tongues being of progressively shorter lengths, and a pipe section provided with slots adapted to be entered by said tongues at distances apart corresponding to the distances between said tongues, substantially as described.

2. The combination of a pipe section pro'- vided with a plurality of locking tongues located around the pipe at predetermined, equally spaced positions, said tongues being of progressively shorter lengths as the circuit of the pipe is made, and a pipe section provided with slots adapted to be entered by said tongues located at distances apart corresponding to the distances between said tongues, substantially as described.

In testimony whereof I aiiX my signature, in presence of two witnesses.

GREEN W. SAUDIFORD.

Witnesses:

M. C. GRooM, MAMIE MARKSTEIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

